MAN98 (Plot 1)

Site: MAN98 (Plot 1)	Land Unit: Warrakbook Basalts
*Aust. Soil Class.:*

General Land Unit Description:
This land unit consists of gently undulating basalt plains in the Macarthur area. In some drainage lines, the basalt has been dissected sufficiently to expose the underlying sediments. The soils on the basalt plains are commonly Brown Kurosols or Chormosols, intermixed with Sodosols, particularly on the lower slopes and drainage depressions.

Two year old Eucalyptus globulus plantation on ex-agricultural land

Site Description:

Geology:	Landform pattern:
Position in landscape:	Internal drainage:

Soil Profile Morphology

A1	0-15 cm	Dark brown (10YR3/3) fine sandy clay loam; weak granular structure (10-20 mm) parting to weak granular structure (2-5 mm); very weak consistence when moderately moist; many medium roots; clear and smooth transition to:
A2	15-35 cm	Brown (10YR5/3) fine sandy clay loam; weak polyhedral structure (20-50 mm) parting to weak granular structure (5-10 mm); very weak consistence when moist; common very fine macropores; areal porosity 0.5%; many medium roots; clear and smooth transition to:
	Subsoil
B1	35-45 cm	Brown (10YR5/3) with common medium faint light yellowish brown (10YR6/4) mottles, light clay; weak polyhedral structure (10-20 mm) parting to weak granular structure (5-10 mm); weak consistence when moist; common medium ferruginous nodules; few very fine macropores; areal porosity 0.05%; common fine roots; clear and smooth transition to:
B21	45-90 cm	Yellowish brown (10YR5/4) with few medium distinct red (2.5YR4/8) light medium clay; moderate polyhedral structure (20-50 mm) parting to moderate granular structure (5- 10 mm); weak consistence when moist; few coarse ferruginous nodules; common very fine macropores; areal porosity 0.05%; few very fine roots; gradual and smooth transition to:
B22	90-140 cm	Light brownish grey (10YR6/2) with few medium distinct yellowish brown (10YR5/4) and red (2.5YR4/6) mottles, medium clay; strong lenticular structure (20-50 mm) parting to strong polyhedral structure (10-20 mm); weak consistence when moist; few coarse ferruginous nodules; common very fine macropores; areal porosity 0.1%; few very fine roots.
	140-340 cm	Roots observed to 270 cm, heavy grey clay, moderately strong lenticular structure.
	340-420 cm	The C Horizon, extremely coarse weathered basalt (up to 1000 mm), live roots many medium roots observed. Basaltic rocks (up to 150 mm) observed. The abundance of rocks in increasing with depth with virtually all rock at 420 cm, resulting in an impeding layer to root growth.

Notes: It appears that roots can penetrate the B horizon.

Sampled by: Ian Sargeant, Paul Feikema, Martin Clark and Kiet Quach (October, 2000).

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